<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Barcode
 * @subpackage Object
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Code39.php 23775 2011-03-01 17:25:24Z ralph $
 */

/**
 * @see Zend_Barcode_Object_ObjectAbstract
 */
require_once 'Zend/Barcode/Object/ObjectAbstract.php';

/**
 * @see 'Zend_Validate_Barcode'
 */
require_once 'Zend/Validate/Barcode.php';

/**
 * Class for generate Code39 barcode
 *
 * @category   Zend
 * @package    Zend_Barcode
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Barcode_Object_Code39 extends Zend_Barcode_Object_ObjectAbstract {
	/**
	 * Coding map
	 * @var array
	 */
	protected $_codingMap = array ('0' => '000110100', '1' => '100100001', '2' => '001100001', '3' => '101100000', '4' => '000110001', '5' => '100110000', '6' => '001110000', '7' => '000100101', '8' => '100100100', '9' => '001100100', 'A' => '100001001', 'B' => '001001001', 'C' => '101001000', 'D' => '000011001', 'E' => '100011000', 'F' => '001011000', 'G' => '000001101', 'H' => '100001100', 'I' => '001001100', 'J' => '000011100', 'K' => '100000011', 'L' => '001000011', 'M' => '101000010', 'N' => '000010011', 'O' => '100010010', 'P' => '001010010', 'Q' => '000000111', 'R' => '100000110', 'S' => '001000110', 'T' => '000010110', 'U' => '110000001', 'V' => '011000001', 'W' => '111000000', 'X' => '010010001', 'Y' => '110010000', 'Z' => '011010000', '-' => '010000101', '.' => '110000100', ' ' => '011000100', '$' => '010101000', '/' => '010100010', '+' => '010001010', '%' => '000101010', '*' => '010010100' );
	
	/**
	 * Partial check of Code39 barcode
	 * @return void
	 */
	protected function _checkParams() {
		$this->_checkRatio ();
	}
	
	/**
	 * Width of the barcode (in pixels)
	 * @return int
	 */
	protected function _calculateBarcodeWidth() {
		$quietZone = $this->getQuietZone ();
		$characterLength = (6 * $this->_barThinWidth + 3 * $this->_barThickWidth + 1) * $this->_factor;
		$encodedData = strlen ( $this->getText () ) * $characterLength - $this->_factor;
		return $quietZone + $encodedData + $quietZone;
	}
	
	/**
	 * Set text to encode
	 * @param string $value
	 * @return Zend_Barcode_Object
	 */
	public function setText($value) {
		$this->_text = $value;
		return $this;
	}
	
	/**
	 * Retrieve text to display
	 * @return string
	 */
	public function getText() {
		return '*' . parent::getText () . '*';
	}
	
	/**
	 * Retrieve text to display
	 * @return string
	 */
	public function getTextToDisplay() {
		$text = parent::getTextToDisplay ();
		if (substr ( $text, 0, 1 ) != '*' && substr ( $text, - 1 ) != '*') {
			return '*' . $text . '*';
		} else {
			return $text;
		}
	}
	
	/**
	 * Prepare array to draw barcode
	 * @return array
	 */
	protected function _prepareBarcode() {
		$text = str_split ( $this->getText () );
		$barcodeTable = array ();
		foreach ( $text as $char ) {
			$barcodeChar = str_split ( $this->_codingMap [$char] );
			$visible = true;
			foreach ( $barcodeChar as $c ) {
				/* visible, width, top, length */
				$width = $c ? $this->_barThickWidth : $this->_barThinWidth;
				$barcodeTable [] = array (( int ) $visible, $width, 0, 1 );
				$visible = ! $visible;
			}
			$barcodeTable [] = array (0, $this->_barThinWidth );
		}
		return $barcodeTable;
	}
	
	/**
	 * Get barcode checksum
	 *
	 * @param  string $text
	 * @return int
	 */
	public function getChecksum($text) {
		$this->_checkText ( $text );
		$text = str_split ( $text );
		$charset = array_flip ( array_keys ( $this->_codingMap ) );
		$checksum = 0;
		foreach ( $text as $character ) {
			$checksum += $charset [$character];
		}
		return array_search ( ($checksum % 43), $charset );
	}
}
